Hoist



y 1953 T. WEATHERFORD 2,646,893

HOIST Filed Sept. 3, 1948 2 Sheets-Sheet 2 T lzeodore h eaikerfard ATTORN EY Patented July 28, 1953 UNITED STATES PATENT OFFICE I 2,646,893 I I i Ho s'r V v V Theodore Weatherford, East st. Louis, 111.

Application September 3, 1948, Serial No. 47,650

This invention relates to hoists and more particularly to hoists adapted to raise boards and the like for the purpose of erecting scaffolds used in constructing of large steel tanks or the like. The

erecting of such scaffolds by hand is a hard, dangerous, slow job, one man standing on a lower scaffold level and passing boards up, one by one, to another man on the next higher level.

The primary object of the invention is to provide a hoist by means of which the boards can be raised easily and safely by one man to the desired level.

Another object of the invention is to provide a hoist adapted to be removably mounted on a movable support, such as a truck used to transport the steel plates for the construction of the tank.

A further object of the invention is to provide a hoist of the character indicated above comprising 'a structural frame adapted to be removably mounted on a truck or the like and a mast supporting the load lifting means of the hoist and removably mounted on the frame and rotatable about its own axis.

Other objects of the invention not specifically mentioned may appear in the following specification describing the invention with reference to the accompanying drawings illustrating a preferred embodiment of the invention. It is, however, to be understood, that the invention is not to be limited or restricted to the exact construction, arrangement and combination of parts described in the specification and shown in the drawings, but that such changes and modifications can be made, which fall within the scope of the claims appended hereto and specifically pointing out the novel features of the invention.

In the several figures of the accompanying drawings similar parts are indicated by similar reference characters and Figure 1 is a side elevational view illustrating an apparatus constructed in accordance with an embodiment of the invention, parts beinginsection and an associated carriage diametrically indicated;

Figure 2 is a View in front elevation of the apparatus with the load bracket omitted;

Figure 3 is a top plan view of the apparatus as shown in Figure 2 Figure 4 is a view in perspective of the load bracket as herein comprised;

Figure 5 is a view in perspective of the opera"- torsplatform supplied;

Figure 6 is a view in perspective of thehand 2 Claims. (01. 212-61) Figure '7 is an enlarged detail sectional view taken substantially on the line'I-I of Figure Figure 8 is an enlarged fragmentary view in elevation of the rear portion of a top member of the frame; and

Figure 9 an enlarged fragmentary View in elevation showing a means for mounting the operators platform.

The hoist as disclosed in the accompanying drawings comprises an 7 elongated substantially rectangular base frame F having a top member If! and a bottom member II. Preferably these members are made from angle iron and are arranged so that one of the legs of each member is in substantially horizontal position and the other leg extends upwardly therefrom. A substantially rectangular plate-I2 is welded onto the edges of the two horizontal legs of and approximately centrally between the end of the frame members I0 and I I so that the lower end edge of the plate I2 is located approximately in the same plane with the under side of the bottom frame member II, and that the upper end edge is arranged approximately in the same plane with the upper edge of the top frame member I0. Adjacent the ends of the said frame members stiffeners I3 are secured between them, and are preferably made from angle iron. In each end surface of the top and bottom frame members a pin I4 is welded and extends downwardly beyond the horizontally'arranged leg of the respective frame member. A diametrical hole I5 extends through each pin I4 adjacent to its lower end.

A bracket plate It is welded onto the upper edges of the central frame plate I2 and the top frame member If and another bracket plate I I is welded to the under side of the bottom frame member H and to the lower edge of the central frame plate I2. Both bracket plates Ifi and II extend beyond the central frame plate I2 and in each bracket plate a hole I8 is provided adjacent tothe free end edge of said plate, so that the holes are arranged coaxially. A sleeve I9 is secured to the under side of the upper bracket plate I6 by welding or the like and another sleeve 20 is firmly attached in a similar manner to the upper surface of the lower bracket plate I I so that said sleeves are located coaxially with the holes I8. A brace 2 I is fastened by welding or the like to the central frame plate I2 adjacent to each side edge thereof and extends slantingly upward. The upper edge of each brace is firmly secured to the under side of the top bracket plate I6 to reinforce thesame.

amen

fits rotatably in the sleeves l9 and 20. A collar 23 surrounds the mast and is secured in position thereon, so that the major portion of the mast extends upwardly from the upper bracket plate 16, when the collar 23 rests on said bracket plate in the manner of an end thrust bearing. The lower end portion of the mast 22 projects beyond the bottom bracket plate I1, and a loose collar 24 surrounding this mast portion is held in position by means of a bolt 25 extending diamete rically through the mast 22 and secured against accidental removal by a nut 26 and a washer 2],

Into the upper end portion of the mast 22 a notch 28 is cut forming diametrically opposite upwardly extending lugs 29, through which a bolt 39 extends. A sheave 3| is rotatably mounted on the bolt 30 between the lugs .29,

A boom B comprises a right hand boom member 32 and a left hand boom member 33. The boom members are made preferably from flat bars and one end portion of each boom member provided an arm Bil extending at anangle of ape proximately ninety degrees to thezm i po t on of the boom member. The other :end portion of eaeh boom member is curved as at 35 to extend in the opposite direction -.to the arm .34. The :two boom members .32 and :38 are connected with .each other by means of cross braces 35 so that the arms 34 are adapted to be arranged longside of the *mast 2-2. .A 'bolt .31 extends diametrically through the mast :and through :the arms 34, ,so that the :boom B is pivotally mounted 1 the mast in such a position that the arms extend upwardly. The :boom members are shaped so that they extend :toward each other from the mast and a sheave 13.9 is :rotatably :mounted be tween 'thebnter .downward1ycurve3i end portions 3.5 zof the hoom :members 32 :and .33 on-a bolt extending zthrc l h .said boom end :I Qrtions.

A winch =35 is :rigidly mounted on a platform 49 -.-se c.ur.ed in :any preferred conventional ln'lanher :to {the mast 252 1 so that it extends in opposite direction '-.to :the boom "B and that the winch .is located'high-enough above the frame F to ,1010- videoperatingaclearance for; said Winch.

Toreinforcerthe 3 platform 4 I ;a.-brace #42 qis provided extending between and welde d onth-e .un- :der surface ofthegplatform and the mast 22. -A hand lever 43 is=securedto the platform AI ,;a n d projects therefrom-radially: for use; in ,turningithe mast :22 trelativelyto-the base frame. ;A flexible Jiifting means .144, such ;as: acable, rope,.,-chain1or the like is secured with oneof .its-endmortions to the .winch 4,9 and is trained .over the two sheaves 3! and .38.

S is 'remov-ably'attached.

.Toprevent the boom Bfrom pivoting'fnrther downwardly than desired, a fiexiblezgslipporting memberwddsuchwasiarope 0r the'likeis secured with-one of itsend portions to a perforatedlug :46 formed :or; fastened on the -mas,t'22--adjacent to .theauppemend thereof and is attached-with-its :other .end portion toran eye bolt .41 extendin .throughqagpaireof fiat bars -48 arranged =0n;the

tcp-and:bottom edges. of; the boom B.

FA load :support. S comprisesv a spreader. bar- 49 preferablymade from;.angle iron. gA -fi at hanger barrfill islsecurcd to; oneofzth gs :ofit-he spreader sbar. centrally. of :theglength: thereofeand extends atsright anglesoto saicflbar. ;On;the longitudinal ':center line of the rhanger? bar $50- ai-holefi5l is provided adjacent i theend-. .edge- -of r the hanger bar. A hook 52 is secured in any conventional manner to thefree and- =por tion of the fiexib1e- On the other .end .portion of the .fi-exibl-elifting imeans 44 a load support lifting means M and this hook is adapted to ex tend through the hole 51 and to hold the load support S. A tension rod 53 extends from each end of the spreader bar 49 inwardly and upwardly and is secured by welding or the like with its inner end portion to the hanger bar adjacent to its upper end edge, and with its other end portion to the respective end portion of the spreader bar 49.

A load supporting bracket L comprises a. bottom member 54, an end member 55 and a top member 56. These members are preferably made from angle iron and two load supporting brackets L are provided. To each end portion of the spreader bar d9 one end portion of one of the top members 515 is secured so that it extends at right angles to said bar and is located at the same "level therewith. To strengthen the conneotion :between the spreader bar and the top members of the load supporting bracket L a gusset pl t 5 i p vided a d f t t a h p of these parts. ffhe end member 55 of each load supporting bracket L connects the free end per"- vtion of the top member 56 with one end portion of t e be t r; e ber of s id ra k t a i egetends at right angles to each of said members. Gusset plates 56 are arranged between the member 35%;31111 the top and bottom members 56 and 5.4 respectively. Each lower bracket member is approximately twice .as long as the top bracket member and is provided at its free ,end with an upwardly extending stop 59.

.On a movable base fifl such as a trucker the like four perforated bracket plates .51 are permanen l se ured o appropriately at 9- right .inembers $52 and each pin ,l 4 of the frame F is adapted to engage one of said bracket plates bybeing inserted into the holes 6 3 therein.

:In this manner a hoist as described above can be remo vably mounted on themovable base 60, which is adapted to carry ,materialfor constructing alargetank orthelike. Boards and similar anaterial for erec ing .a scaffold are placed on the two load supporting brackets L and the winch AG .is set in motion ;to lift the .boards to ,the..desi red.lev.el. jlfhe load canbe. directed to thedesiredplace by pivotingthamas t -i2 about its axisbymeans of the hand lever .43 .orlby pnlli-ngitne movable basefidinto the desired posit n relative to .ithe tank being constructed, by n 1ean s .of a hand .yvrench .65. This hand wrencheomprises a back fi'iontheundersidelof which fonr-lugs- -tis are formed orse cured and so th th shell of h -.1a a -t e ngaged rby said lugs. The back .61 has alhandle 6.9 .s ormed in e a ly th ewith, to increase th leverage power of, the wrenchififi.

"fliozfaci'l-itatejthe operation of the hoist .embodied herein an operatorfs platforml isremovably mounted on the movablebasesfill. It comprises two rig-htangled-triangular brackets 'lfl preferablymade'fromangle iron. A hook?! is welded onto one -of the sidemembers of each bracket-ll] adjacent to one of the acute angles of eidbr q etnra roi u p rtbars zw re ,r manently secured tothe movable ,ba se. ;6 0 ,and the hooksll ,of the brackets lilareadapted to. engage the said bars, so that the bracketaare. removably supported,.by said. bars. Planks 14; orjthelike, are placed on the brackets; 10; to form the fioor of h aopera oli l rm: The bar "1 may, be formed in U shape if desired and arearranged at ;-appropriate places-pn-the base 60,.to enablean operator located on the platform to reach and manipulate the hand lever 43 and thewinch 40 easily and comfortably.

In'the present embodiment of the invention, the winch 40 is illustrated as being manually rotated by a conventional crank 15. It is believed apparent however that other means may be used for this purpose.

I claim:

1. A device of the class described including a base frame, a mast rotatably and removably mounted on the frame, a boom pivotally mounted for vertical swinging movements on said mast, means extending between said mast and a point adjacent the free end of said boom for limiting the downward swinging movement of the latter, a sheave rotatably mounted on the top of the mast, a second sheave rotatably mounted on the free end portion of the boom, a platform secured to the mast, a winch mounted on the platform, a flexible load lifting means extending from the winch and trained over the two sheaves, and a detachable load support carried at the free end of said load lifting means.

2. The invention as defined in claim 1, with the said boom comprised in a pair of elongated spaced bars converging toward the outer ends 6 thereof and their inner ends disposed at opposite sides of said mast and upturned, pivot means extending through said mast and the free ends of the upturned portions of said bars, and said second sheave journalled between the outer ends of said bars.

THEODORE WEATHERFORD.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 275,540 Tarr Apr. 10, 1883 307,876 Steltemeyer Nov. 11, 1884 474,963 Marshall May 17, 1892 634,586 Petterson Oct. 10, 1899 754,586 Maxwell Mar. 15, 1904 813,352 Combs Feb. 20, 1906 873,374 Jenkins Dec. 10, 1907 917,686 Wagner Apr. 6, 1909 1,026,901 Brown May 21, 1912 1,061,838 Hagerman May 13, 1913 1,161,258 Shelton Nov. 23, 1915 1,461,307 Chapman July 10, 1923 1,905,434 Boyer Apr. 25, 1933 2,374,045 Soncia Apr. 17, 1945 

